Furnace



(No Model.) 2 Sheets-Sheet 1.

T. B. MOORE.

FURNACE. No. 451,185. Patented Apr. 28, 1891.

.2 Shets-Sheet 2.

FURNACE.

Patented Apr. 28, 1891.

(No Model.)

UNITED STATES THOMAS B. MOORE, OF ROCHESTER, NEXV YORK.

Fries...

FURNACE.

SPECIFICATION forming part of Letters Patent N0. 451,185, dated April 28, 1891. Application filed May 5,1890. fierial No. 350,678. (No model.)

To all whom it may concern.-

Be it known that I, THOMAS E. MOORE, a citizen of the United States, residing at Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Furnaces; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the figures of reference marked thereon, which form a part of this specification.

My invention relates to improvements in furnaces, and more particularly to that class of furnaces which have for their object the entire consumption of all the products of combust-ion.

My invention consists in the arrangements of the draft, which is fed or drawn into the fire-box through a series of channels or passages located in the walls of the furnace, and said channels or passages leading from a general air-chamber located at the top of the furnace downwardly, (in close proximity to the fire-box and combustion-chamber,) and dis charges therein at the forward end of the firebox and through the bridge-wall.

My invention further consists in the details of its construction, all of which I will now proceed to definitely describe and claim.

In the drawings, Figure 1 is a vertical longitudinal section of the side wall of a furnace, taken in the line X X of Fig. 4., and into which my improved superheating-passages are arranged. Fig. 2 is a vertical central longitudinal section of a furnace equipped with my improvement. Fig. 3 is a perspective view of the same with parts broken away to show construction; and Fig. 4 is a horizontal view of my improvement, taken in the line Y Y of Fig. 2.

Referring to the drawings, 1 is the body of the furnace, into which the boiler 2 is set. At the upper end of the wall of the furnace 1 is located the air chamber 3, which extends nearly around the boiler, as seen in dotted lines, Fig. 4. On the top surface of this airchamber 3 are located openings 4 for the admission of the air, which is drawn from the upper portion of the room in which the furnace is located; This air after passing into the chamber 3 passes down through the superheating-passages 5 5, 6 6, 7 '7, and 8,10- cated in the sides and rear Wall of the furnace. (See Figs. 1 and 4.) The forward passages 5 5, which lead from the chamber 3, pass down to the forward end of the fire-box and just above the grate-bars, as more clearly shown in Fig. At the ends of the passages are arranged short nozzles or mouth-pieces 9 9, which direct the current of air or draft to the center of the fire-box. The passages 6 6, leading from the chamber 3, pass down the side Wall of the furnace until reaching a point below the line of the grate-bars, where they take a forward direction leading to the forward end of the furnace and, returning along the side wall of the fire-box, discharge into the chamber 10, arranged in the front section of-the bridge-wall. These passages 6 6 have open connection with the passages 5 5 at the forward lower end of the side wallof the furnace, as seen in Fig. 1.- The bridge-wall is arranged into what may be called two sections 11 and 12. The superheated air entering the chamber 10 of the sect-ion 11 of the bridge-Wall passes out into the rear of the firebox, as shown in Fig. 2, serving to retard the particles of combustion within the fire-box. The passages 7 7, leading from the chamber 3, pass downwardly in the side walls of the furnace and discharge into the chamber 13,

arranged in the section l2 of the bridge-Wall,

from which chamber it passes out into the firebox over the section 11. and out at the upper rear end of the bridge-wall orsection 12 into the combustion-chamben The passage 8, leading from the chamber 3, passes down through the rear wall of the furnace to a given point, where it takes a forward direction and discharges into the chamber 13 of the section 12 of the bridge-wall. This chamber 13 may be divided into three separate compartments, one passage leading into each, without departing from the spirit of my invention.

At the opening l in the chamber 3 are arranged the slides or damper 14: for regulating the supply of air to the superheating-passages.

In operation the first steam is made in the ordinary way by taking the draft through the ash-pit doors and grate-bars, and after the furnace has been thoroughly heated the ashpit doors are closed (or nearly so, as the case may require) and the draft or air is taken from the top of the boiler-room and drawn into the chamber 3, and from thence into the passages above referred to, when it discharges at both sides of the forward end of the fireboX at the rear of the fire-box through the bridge-wall and into the forward end of the combustion-chamber. By this construction a most thorough consumption of the particles of combustion is obtained. 7

I claim 1. A furnace for steam-generating, having a series of superheating-passages leading from a general heating-chamber located along the upper side and rear walls of the furnace, and said superheating-passages passing down the side and rear walls of the furnace and opening into the fire-box at its forward end on both sides and entering the rear end of the fire-box and forward end of the combustionchamber through the bridge-wall, substantially as shown.

2. In a furnace for steanrgenerating and other purposes, a bridge-wall consisting of a front and rear section, both sections having superheating chambers or compartments supplied with air from passages located in the side and rear walls of the furnace and leading from a general chamber arranged at the top of the furnace, said air passing into the furnace at the rear of the fire-box and at the forward end of the combustion-chamber, substantially as shown and described.

3. In a furnace for steam-generating and other purposes, the air-chamber 3, located at the top of the furnace, with regulating doors or slides at, superheating-passages 5 5, 6 6, 7 7, and 8, leading from said air-chamber and opening into the forward end of the fire-box in both sides and into the bridge-wall, from whence it enters into the rear of the fire-box and forward end' of the combustion-chamber, 

